It's happened to me twice now: people that won't send their light until they receive mine first.
Am I making too much of this? It's as if they don't trust me but want me to trust them.
On one trade, I wasn't made aware of the stipulation until after I already had my light in the mail. (Not sure I would have made the trade had I known in advance just based on principle alone.)
I probably AM making too much of this...